Comparison of Convection Characteristics at the Tropical Western Pacific Darwin Site Between Observation and Global Climate Models Simulations
|
|
- Isabella McCoy
- 5 years ago
- Views:
Transcription
1 Comparison of Convection Characteristics at the Tropical Western Pacific Darwin Site Between Observation and Global Climate Models Simulations G.J. Zhang Center for Atmospheric Sciences Scripps Institution of Oceanography La Jolla, California Introduction One of the scientific objectives of the ARM Tropical Warm Pool International Cloud Experiment (TWP- ICE) planned for early 2006 at Darwin, Australia is to describe convection characteristics and its interaction with the large-scale fields. In view of the short duration of the experiment, it is important to determine the long-term statistics of convection and its associated clouds from the observations and global climate models (GCM) so as to put the experiment results in proper climate perspective. For this purpose, we examine several important fields associated with the characteristics of convection and the relationships between convection and clouds using GCM simulations and available satellite and surface observations. These include the seasonal variation of convection, the relationships between convection and the upper-level cloud amount, cloud ice water content and cloud radiative forcing. One major goal of the ARM program is to improve GCM cloud and convection parameterizations. Using NCAR Community Atmosphere Model (CAM3), we demonstrate that GCM simulations in the tropical western Pacific including Darwin can be significantly improved by improving convection parameterization. Data and Model The data used in this study include surface observations of winds and precipitation at the TWP Darwin site of the ARM program from March 2002 to December 2004, Tropical Rainfall Measurement Mission (TRMM) hourly rainfall gridded to GCM resolution (T42), climatological annual cycle of International Satellite Cloud Climatology Project (ISCCP) high-cloud amount, Earth Radiation Budget Experiment (ERBE) shortwave and longwave cloud radiative forcing, and Xie-Arkin precipitation. The global model is the NCAR CAM3, with the new convection closure developed using the ARM SGP data (Zhang 2002). The model simulation with the new convection parameterization improvement is run for 16 years from 1979 to The last 15 years is used in the analysis. The model simulation without the new convection scheme modification is from the standard CAM3 AMIP (Atmospheric Model Intercomparison Project) run obtained from NCAR database. Results Before presenting results at the TWP Darwin site, we first demonstrate that the simulation of the global climate using the NCAR CAM3 and the new convection closure of Zhang (2002) is in good agreement with the observations. Figure 1 shows the global distribution of precipitation for boreal winter (DJF). 1
2 Figure 1. Climatological precipitation distribution for boreal winter (DJF) from (top) the CAM3 simulation with the new convection closure and (bottom) the Xie-Arkin observations, respectively. The units are in mm day -1. Both the Southern Pacific Convergence Zone (SPCZ) and the Indian Ocean Inter-tropical Convergence Zone (ITCZ) are well simulated. The longstanding problem of the primary precipitation belt in the Pacific staying north of the Equator during the winter season in CAM3 is resolved. This can be seen by comparing Figure 1 with the DJF climate in the standard CAM3 simulation (Figure 2). Next, we compare the model simulation with the observations at the TWP Darwin site. Figure 3 shows the probability distribution function (PDF) of hourly rainfall intensity and its contribution to the total rainfall at Darwin from the CAM3 model simulations and the two observation sources, TRMM and ARM. Since ARM observations are at a single surface station while CAM3 and TRMM are averages over a GCM grid box, the ARM data are averaged over 24-hrs to account for the spatial mismatch. With the mean wind speed at Darwin near 3 m/s, 24-hr average roughly corresponds to spatial average over a GCM grid box for a steady-state system. In the figure, the range of precipitation rates is divided into 0.1 mm hr -1 bins from 0 to 9 mm hr -1, with precipitation rates higher than 8 mm hr -1 lumped into the last bin. The probability distribution of the precipitation intensity (Figure 3a) shows that precipitation in the standard CAM3 run (labeled ctrl in the figure) has a very narrow distribution, occurring much more frequently at precipitation rates below 1 mm hr -1, and much less frequently at precipitation rates above 1 mm hr -1 than those in the new CAM3 run (labeled Exp in the figure) and the TRMM and ARM 2
3 Figure 2. Same as in Figure 1, but from the standard CAM3 simulation. Figure 3. Frequency distributions of (a) precipitation rate, (b) relative contribution to total precipitation, and (c) cumulative contribution from each binned precipitation rate based on hourly mean precipitation data at the TWP Darwin site. The ARM surface observations are 24-hr averages (see text for details). 3
4 observations. The probability distributions for the new CAM3 run and the observations are much closer. The relative contribution to the total precipitation from each bin (Figure 3b), which is the product of the frequency of occurrence and the mean precipitation rate within the bin divided by the total precipitation, and the cumulative contribution plots (Figure 3c) show that for the standard CAM3 run, about 90% of the total precipitation is from precipitation events with intensities less than 1 mm hr -1. Within this narrow band, the peak contribution comes from precipitation rates near 0.5 mm hr -1. Contributions from precipitation intensities greater than 2 mm hr -1 are negligible. In comparison, in the new CAM3 simulation, as well as in the TRMM and ARM observations, contributions from rainfall rates greater than 2 mm hr -1 account for about 40% of the total rain. The improvement in the precipitation intensity PDF is similar in the global tropical belt (Zhang and Mu 2005). Using the multi-year CAM3 simulations, we examined the annual cycle of precipitation, high-cloud amount, shortwave and longwave cloud radiative forcing at the ARM TWP Darwin site. Figure 4 shows that during the Australian monsoon season (DJF) precipitation, high-cloud amount, and shortwave cloud forcing at Darwin are all well simulated with the new convection closure compared with the available observations. The standard CAM3 produces too much precipitation, high-level clouds and shortwave cloud forcing. However, longwave cloud forcing in the new CAM3 simulation is degraded. This seems to suggest that convective cloud tops may be too low in the model in the new simulation. Figure 4. Annual cycle of precipitation, high-level cloud amount, shortwave and longwave cloud radiative forcing at Darwin from CAM3 simulations and observations. 4
5 To demonstrate importance of convection in determining the cloud microphysical and radiative properties, Figure 5 shows the layer averaged cloud ice water content from 500 mb to 100 mb, shortwave cloud forcing, in-cloud ice water path and cloud fraction as functions of convective heating rate at 500 mb from the new CAM3 simulation at the Darwin site during the monsoon season. There is a strong dependence of all these fields on the intensity of convective heating. When there is more convection, there is more upper-level cloud amount, more ice water in the clouds, and thus more cloud radiative forcing. Figure 5. Upper troposphere cloud ice content averaged between 500 and 100 mb, SW cloud forcing, in-cloud ice water path and high-cloud amount as functions of convective heating at 500 mb, showing the dependence of these quantities on the intensity of convection. Each point represents a monthly average. 5
6 Conclusions The NCAR CAM3 simulations with and without the improvement in convection parameterization are compared with observations at the ARM TWP Darwin site. It shows that significant improvement in the simulated DJF precipitation and rainfall intensity PDF can be achieved both locally at Darwin and globally by modifying convection parameterization. The relationships between convective heating and the high-level cloud properties in the model indicate that convection is very important in determining the cirrus/anvil cloud properties at Darwin. Contact Z. Zhang, (858) Acknowledgment References May, PT, C Jacob, and JH Mather Tropical Warm Pool International Cloud Experiment (TWP- ICE): Cloud and rain characteristics in the Australian monsoon. Available at Zhang, GJ Convective quasi-equilibrium in midlatitude continental environment and its effect on convective parameterization. Journal of Geophysical Research 107(D14):4220, doi: /2001jd Zhang, GJ, and M Mu Effects of modifications to the Zhang-McFarlane convection parameterization on the simulation of the tropical precipitation in the National Center for Atmospheric Research Community Climate Model: Version 3. Journal of Geophysical Research 110, D09109, doi: /2004jd
Correspondence between short and long timescale systematic errors in CAM4/CAM5 explored by YOTC data
Correspondence between short and long timescale systematic errors in CAM4/CAM5 explored by YOTC data Hsi-Yen Ma In collaboration with Shaocheng Xie, James Boyle, Stephen Klein, and Yuying Zhang Program
More informationIntermittency in precipitation: duration, frequency, intensity and amounts using hourly data
Intermittency in precipitation: duration, frequency, intensity and amounts using hourly data Kevin E Trenberth with Yongxin Zhang and Maria Gehne NCAR How should rainfall change as climate changes? Usually
More informationConvection Trigger: A key to improving GCM MJO simulation? CRM Contribution to DYNAMO and AMIE
Convection Trigger: A key to improving GCM MJO simulation? CRM Contribution to DYNAMO and AMIE Xiaoqing Wu, Liping Deng and Sunwook Park Iowa State University 2009 DYNAMO Workshop Boulder, CO April 13-14,
More informationNOTES AND CORRESPONDENCE. Seasonal Variation of the Diurnal Cycle of Rainfall in Southern Contiguous China
6036 J O U R N A L O F C L I M A T E VOLUME 21 NOTES AND CORRESPONDENCE Seasonal Variation of the Diurnal Cycle of Rainfall in Southern Contiguous China JIAN LI LaSW, Chinese Academy of Meteorological
More informationOn Improving Precipitation Diurnal Cycle and Frequency in Global Climate Models
On Improving Precipitation Diurnal Cycle and Frequency in Global Climate Models Xiaoqing Wu Department of Geological and Atmospheric Sciences Iowa State University (ISU) The YOTC International Science
More informationMoist static energy budget diagnostics for. monsoon research. H. Annamalai
Moist static energy budget diagnostics for monsoon research H. Annamalai JJAS Precipitation and SST Climatology I III II Multiple regional heat sources - EIO and SPCZ still experience high precipitation
More informationAnalysis of the Hydrologic Cycle in the Community Atmosphere Model
Meteorology Senior Theses Undergraduate Theses and Capstone Projects 12-1-2017 Analysis of the Hydrologic Cycle in the Community Atmosphere Model Kyle A. Knight Iowa State University Follow this and additional
More information4.4 EVALUATION OF AN IMPROVED CONVECTION TRIGGERING MECHANISM IN THE NCAR COMMUNITY ATMOSPHERE MODEL CAM2 UNDER CAPT FRAMEWORK
. EVALUATION OF AN IMPROVED CONVECTION TRIGGERING MECHANISM IN THE NCAR COMMUNITY ATMOSPHERE MODEL CAM UNDER CAPT FRAMEWORK Shaocheng Xie, James S. Boyle, Richard T. Cederwall, and Gerald L. Potter Atmospheric
More informationAn Intercomparison of Single-Column Model Simulations of Summertime Midlatitude Continental Convection
An Intercomparison of Single-Column Model Simulations of Summertime Midlatitude Continental Convection S. J. Ghan Pacific Northwest National Laboratory Richland, Washington D. A. Randall, K.-M. Xu, and
More informationMarchand et al. 2008, Comparison of MMF with CloudSat Accepted JGR 05/2008 p. 1. A Comparison of Simulated Cloud Radar Output
Marchand et al. 2008, Comparison of MMF with CloudSat Accepted JGR 05/2008 p. 1 A Comparison of Simulated Cloud Radar Output from the Multiscale Modeling Framework Global Climate Model with CloudSat Cloud
More informationCHAPTER 2 DATA AND METHODS. Errors using inadequate data are much less than those using no data at all. Charles Babbage, circa 1850
CHAPTER 2 DATA AND METHODS Errors using inadequate data are much less than those using no data at all. Charles Babbage, circa 185 2.1 Datasets 2.1.1 OLR The primary data used in this study are the outgoing
More informationAnalysis of Cloud-Radiation Interactions Using ARM Observations and a Single-Column Model
Analysis of Cloud-Radiation Interactions Using ARM Observations and a Single-Column Model S. F. Iacobellis, R. C. J. Somerville, D. E. Lane, and J. Berque Scripps Institution of Oceanography University
More informationDifferences in rain rate intensities between TRMM observations and community atmosphere model simulations
GEOPHYSICAL RESEARCH LETTERS, VOL. 34, L01808, doi:10.1029/2006gl027246, 2007 Differences in rain rate intensities between TRMM observations and community atmosphere model simulations Yi Deng, 1 Kenneth
More informationJ1.2 OBSERVED REGIONAL AND TEMPORAL VARIABILITY OF RAINFALL OVER THE TROPICAL PACIFIC AND ATLANTIC OCEANS
J1. OBSERVED REGIONAL AND TEMPORAL VARIABILITY OF RAINFALL OVER THE TROPICAL PACIFIC AND ATLANTIC OCEANS Yolande L. Serra * JISAO/University of Washington, Seattle, Washington Michael J. McPhaden NOAA/PMEL,
More informationTropical cyclones and seasonal means in high-resolution CAM 5 runs.
Tropical cyclones and seasonal means in high-resolution CAM 5 runs. Julio Bacmeister ( NESL ) NCAR Earth System Laboratory Collaborators/contributors: Peter Lauritzen, Jerry Olson, John Truesdale +CAM-5
More informationClimate Feedbacks from ERBE Data
Climate Feedbacks from ERBE Data Why Is Lindzen and Choi (2009) Criticized? Zhiyu Wang Department of Atmospheric Sciences University of Utah March 9, 2010 / Earth Climate System Outline 1 Introduction
More informationNSF 2005 CPT Report. Jeffrey T. Kiehl & Cecile Hannay
NSF 2005 CPT Report Jeffrey T. Kiehl & Cecile Hannay Introduction: The focus of our research is on the role of low tropical clouds in affecting climate sensitivity. Comparison of climate simulations between
More informationThe Formation of Precipitation Anomaly Patterns during the Developing and Decaying Phases of ENSO
ATMOSPHERIC AND OCEANIC SCIENCE LETTERS, 2010, VOL. 3, NO. 1, 25 30 The Formation of Precipitation Anomaly Patterns during the Developing and Decaying Phases of ENSO HU Kai-Ming and HUANG Gang State Key
More informationConvective scheme and resolution impacts on seasonal precipitation forecasts
GEOPHYSICAL RESEARCH LETTERS, VOL. 30, NO. 20, 2078, doi:10.1029/2003gl018297, 2003 Convective scheme and resolution impacts on seasonal precipitation forecasts D. W. Shin, T. E. LaRow, and S. Cocke Center
More informationWhy There Is Weather?
Lecture 6: Weather, Music Of Our Sphere Weather and Climate WEATHER The daily fluctuations in atmospheric conditions. The atmosphere on its own can produce weather. (From Understanding Weather & Climate)
More informationIncorporation of 3D Shortwave Radiative Effects within the Weather Research and Forecasting Model
Incorporation of 3D Shortwave Radiative Effects within the Weather Research and Forecasting Model W. O Hirok and P. Ricchiazzi Institute for Computational Earth System Science University of California
More informationSingle-Column Modeling, General Circulation Model Parameterizations, and Atmospheric Radiation Measurement Data
Single-Column ing, General Circulation Parameterizations, and Atmospheric Radiation Measurement Data S. F. Iacobellis, D. E. Lane and R. C. J. Somerville Scripps Institution of Oceanography University
More informationAn Introduction to Physical Parameterization Techniques Used in Atmospheric Models
An Introduction to Physical Parameterization Techniques Used in Atmospheric Models J. J. Hack National Center for Atmospheric Research Boulder, Colorado USA Outline Frame broader scientific problem Hierarchy
More informationMesoscale and High Impact Weather in the South American Monsoon Leila M. V. Carvalho 1 and Maria A. F. Silva Dias 2 1
Mesoscale and High Impact Weather in the South American Monsoon Leila M. V. Carvalho 1 and Maria A. F. Silva Dias 2 1 University of California, Santa Barbara 2 University of Sao Paulo, Brazil Objectives
More informationWater Balance in the Murray-Darling Basin and the recent drought as modelled with WRF
18 th World IMACS / MODSIM Congress, Cairns, Australia 13-17 July 2009 http://mssanz.org.au/modsim09 Water Balance in the Murray-Darling Basin and the recent drought as modelled with WRF Evans, J.P. Climate
More informationImproved rainfall and cloud-radiation interaction with Betts-Miller-Janjic cumulus scheme in the tropics
Improved rainfall and cloud-radiation interaction with Betts-Miller-Janjic cumulus scheme in the tropics Tieh-Yong KOH 1 and Ricardo M. FONSECA 2 1 Singapore University of Social Sciences, Singapore 2
More informationInstitute of Atmospheric Physics, Chinese Academy of Sciences, Beijing University of Hawaii at Manoa, Honolulu, HI 96822
ADVANCES IN ATMOSPHERIC SCIENCES, VOL. 24, NO. 2, 2007, 323 335 Improvements in Climate Simulation with Modifications to the Tiedtke Convective Parameterization in the Grid-Point Atmospheric Model of IAP
More informationMC-KPP: Efficient, flexible and accurate air-sea coupling
MC-KPP: Efficient, flexible and accurate air-sea coupling Nick Klingaman NCAS-Climate, University of Reading Shortwave Longwave Latent Sensible Wind Prescribe SSTs and sea ice Pro: Computationally inexpensive,
More informationThe Climatology of Clouds using surface observations. S.G. Warren and C.J. Hahn Encyclopedia of Atmospheric Sciences.
The Climatology of Clouds using surface observations S.G. Warren and C.J. Hahn Encyclopedia of Atmospheric Sciences Gill-Ran Jeong Cloud Climatology The time-averaged geographical distribution of cloud
More informationAll objects emit radiation. Radiation Energy that travels in the form of waves Waves release energy when absorbed by an object. Earth s energy budget
Radiation Energy that travels in the form of waves Waves release energy when absorbed by an object Example: Sunlight warms your face without necessarily heating the air Shorter waves carry more energy
More informationComparisons of satellites liquid water estimates to ECMWF and GMAO analyses, 20th century IPCC AR4 climate simulations, and GCM simulations
GEOPHYSICAL RESEARCH LETTERS, VOL. 35, L19710, doi:10.1029/2008gl035427, 2008 Comparisons of satellites liquid water estimates to ECMWF and GMAO analyses, 20th century IPCC AR4 climate simulations, and
More informationName: Date: Hour: Comparing the Effects of El Nino & La Nina on the Midwest (E4.2c)
Purpose: Comparing the Effects of El Nino & La Nina on the Midwest (E4.2c) To compare the effects of El Nino and La Nina on the Midwest United States. Background Knowledge: The El Nino-Southern Oscillation
More informationNOTES AND CORRESPONDENCE. On the Radiative and Dynamical Feedbacks over the Equatorial Pacific Cold Tongue
15 JULY 2003 NOTES AND CORRESPONDENCE 2425 NOTES AND CORRESPONDENCE On the Radiative and Dynamical Feedbacks over the Equatorial Pacific Cold Tongue DE-ZHENG SUN NOAA CIRES Climate Diagnostics Center,
More informationGlobal sea surface temperature October 25 th 2007
The VOCALS Regional Experiment Aerosols, clouds, and precipitation in southeast Pacific stratocumulus Robert Wood Atmospheric Sciences University of Washington Global sea surface temperature October 25
More informationImpact of a revised convective triggering mechanism on Community Atmosphere Model, Version 2, simulations: Results from short-range weather forecasts
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 109,, doi:10.1029/2004jd004692, 2004 Impact of a revised convective triggering mechanism on Community Atmosphere Model, Version 2, simulations: Results from short-range
More informationMET 3102-U01 PHYSICAL CLIMATOLOGY (ID 17901) Lecture 14
MET 3102-U01 PHYSICAL CLIMATOLOGY (ID 17901) Lecture 14 The hydrologic cycle evaporation vapor transport precipitation precipitation evaporation runoff Evaporation, precipitation, etc. in cm Vapor transported
More informationA Climatology of Surface Cloud Radiative Effects at the ARM Tropical Western Pacific Sites
996 J O U R N A L O F A P P L I E D M E T E O R O L O G Y A N D C L I M A T O L O G Y VOLUME 52 A Climatology of Surface Cloud Radiative Effects at the ARM Tropical Western Pacific Sites SALLY A. MCFARLANE,
More informationABSTRACT 2 DATA 1 INTRODUCTION
16B.7 MODEL STUDY OF INTERMEDIATE-SCALE TROPICAL INERTIA GRAVITY WAVES AND COMPARISON TO TWP-ICE CAM- PAIGN OBSERVATIONS. S. Evan 1, M. J. Alexander 2 and J. Dudhia 3. 1 University of Colorado, Boulder,
More informationStochastic convective parameterization
deep Stochastic convective parameterization J. David Neelin and Johnny W.-B.. Lin* Dept. of Atmospheric Sciences & Inst. of Geophysics and Planetary Physics, U.C.L.A. *CIRES, Boulder, CO (now U. Chicago)
More informationLecture 2: Light And Air
Lecture 2: Light And Air Earth s Climate System Earth, Mars, and Venus Compared Solar Radiation Greenhouse Effect Thermal Structure of the Atmosphere Atmosphere Ocean Solid Earth Solar forcing Land Energy,
More informationWaVaCS summerschool Autumn 2009 Cargese, Corsica
Introduction Part I WaVaCS summerschool Autumn 2009 Cargese, Corsica Holger Tost Max Planck Institute for Chemistry, Mainz, Germany Introduction Overview What is a parameterisation and why using it? Fundamentals
More informationDevelopment of a Coupled Atmosphere-Ocean-Land General Circulation Model (GCM) at the Frontier Research Center for Global Change
Chapter 1 Atmospheric and Oceanic Simulation Development of a Coupled Atmosphere-Ocean-Land General Circulation Model (GCM) at the Frontier Research Center for Global Change Project Representative Tatsushi
More informationGEWEX Cloud System Study (GCSS)
GEWEX Cloud System Study (GCSS) The goal of GCSS is to improve the parameterization of cloud systems in GCMs (global climate models) and NWP (numerical weather prediction) models through improved physical
More informationCloud feedbacks on dynamics and SST in an equatorial mock-walker circulation
Cloud feedbacks on dynamics and SST in an equatorial mock-walker circulation Equator (f=0) p W Pacific Warm SST x E Pacific Colder SST Ocean heat loss Very cold deep ocean Understand cloud feedbacks on:
More informationStandalone simulations: CAM3, CAM4 and CAM5
Standalone simulations: CAM3, and CAM5 CAM5 Model Development Team Cécile Hannay, Rich Neale, Andrew Gettelman, Sungsu Park, Joe Tribbia, Peter Lauritzen, Andrew Conley, Hugh Morrison, Phil Rasch, Steve
More informationA "New" Mechanism for the Diurnal Variation of Convection over the Tropical Western Pacific Ocean
A "New" Mechanism for the Diurnal Variation of Convection over the Tropical Western Pacific Ocean D. B. Parsons Atmospheric Technology Division National Center for Atmospheric Research (NCAR) Boulder,
More informationLecture 3. Background materials. Planetary radiative equilibrium TOA outgoing radiation = TOA incoming radiation Figure 3.1
Lecture 3. Changes in planetary albedo. Is there a clear signal caused by aerosols and clouds? Outline: 1. Background materials. 2. Papers for class discussion: Palle et al., Changes in Earth s reflectance
More informationGEO1010 tirsdag
GEO1010 tirsdag 31.08.2010 Jørn Kristiansen; jornk@met.no I dag: Først litt repetisjon Stråling (kap. 4) Atmosfærens sirkulasjon (kap. 6) Latitudinal Geographic Zones Figure 1.12 jkl TØRR ATMOSFÆRE Temperature
More informationExtratropical and Polar Cloud Systems
Extratropical and Polar Cloud Systems Gunilla Svensson Department of Meteorology & Bolin Centre for Climate Research George Tselioudis Extratropical and Polar Cloud Systems Lecture 1 Extratropical cyclones
More informationA Longwave Broadband QME Based on ARM Pyrgeometer and AERI Measurements
A Longwave Broadband QME Based on ARM Pyrgeometer and AERI Measurements Introduction S. A. Clough, A. D. Brown, C. Andronache, and E. J. Mlawer Atmospheric and Environmental Research, Inc. Cambridge, Massachusetts
More informationReal case simulations using spectral bin cloud microphysics: Remarks on precedence research and future activity
Real case simulations using spectral bin cloud microphysics: Remarks on precedence research and future activity Takamichi Iguchi 1,2 (takamichi.iguchi@nasa.gov) 1 Earth System Science Interdisciplinary
More informationCharacteristics of Global Precipitable Water Revealed by COSMIC Measurements
Characteristics of Global Precipitable Water Revealed by COSMIC Measurements Ching-Yuang Huang 1,2, Wen-Hsin Teng 1, Shu-Peng Ho 3, Ying-Hwa Kuo 3, and Xin-Jia Zhou 3 1 Department of Atmospheric Sciences,
More informationLecture 8. Monsoons and the seasonal variation of tropical circulation and rainfall
Lecture 8 Monsoons and the seasonal variation of tropical circulation and rainfall According to the second hypothesis, the monsoon is a manifestation of the seasonal variation of the tropical circulation
More informationENSO and April SAT in MSA. This link is critical for our regression analysis where ENSO and
Supplementary Discussion The Link between El Niño and MSA April SATs: Our study finds a robust relationship between ENSO and April SAT in MSA. This link is critical for our regression analysis where ENSO
More informationDevelopment of a High-Resolution Coupled Atmosphere-Ocean-Land General Circulation Model for Climate System Studies
Chapter 1 Earth Science Development of a High-Resolution Coupled Atmosphere-Ocean-Land General Circulation Model for Climate System Studies Project Representative Tatsushi Tokioka Frontier Research Center
More informationAugust 4, :21 WSPC/ X 244-ADSAA
2nd Reading Advances in Data Science and Adaptive Analysis Vol. 8, No. 2 (2016) 1650006 (12 pages) c World Scientific Publishing Company DOI: 10.1142/S2424922X16500066 Simulation of High-Resolution Precipitable
More informationAiguo Dai * and Kevin E. Trenberth National Center for Atmospheric Research (NCAR) $, Boulder, CO. Abstract
9.2 AMS 14 th Symposium on Global Change and Climate Variations, 9-13 Feb. 2003, Long Beach, CA. Diurnal Variations in the Community Climate System Model Aiguo Dai * and Kevin E. Trenberth National Center
More informationProjected change in the East Asian summer monsoon from dynamical downscaling
Copyright KIOST, ALL RIGHTS RESERVED. Projected change in the East Asian summer monsoon from dynamical downscaling : Moisture budget analysis Chun-Yong Jung 1,2, Chan Joo Jang 1*, Ho-Jeong Shin 1 and Hyung-Jin
More informationCOURSE CLIMATE SCIENCE A SHORT COURSE AT THE ROYAL INSTITUTION
COURSE CLIMATE SCIENCE A SHORT COURSE AT THE ROYAL INSTITUTION DATE 4 JUNE 2014 LEADER CHRIS BRIERLEY Course Outline 1. Current climate 2. Changing climate 3. Future climate change 4. Consequences 5. Human
More informationThe skill of ECMWF cloudiness forecasts
from Newsletter Number 143 Spring 215 METEOROLOGY The skill of ECMWF cloudiness forecasts tounka25/istock/thinkstock doi:1.21957/lee5bz2g This article appeared in the Meteorology section of ECMWF Newsletter
More information7.10 EVALUATING NEW CLOUD-RADIATION AND HYDROLOGIC CYCLE PARAMETERIZATIONS. Scripps Institution of Oceanography, University of California, San Diego
7.10 EVALUATING NEW CLOUD-RADIATION AND HYDROLOGIC CYCLE PARAMETERIZATIONS Sam F. Iacobellis * and Richard C. J. Somerville Scripps Institution of Oceanography, University of California, San Diego 1. INTRODUCTION
More informationCourse Outline CLIMATE SCIENCE A SHORT COURSE AT THE ROYAL INSTITUTION. 1. Current climate. 2. Changing climate. 3. Future climate change
COURSE CLIMATE SCIENCE A SHORT COURSE AT THE ROYAL INSTITUTION DATE 4 JUNE 2014 LEADER CHRIS BRIERLEY Course Outline 1. Current climate 2. Changing climate 3. Future climate change 4. Consequences 5. Human
More informationTropical Meteorology. Roger K. Smith INDO IR
Tropical Meteorology Roger K. Smith INDO IR 01010510 1 GMS IR 01022621 GOES IR 00112909 2 Introduction to the tropics The zonal mean circulation (Hadley circulation) The data network in the tropics (field
More informationDiurnal Variability of the Hydrologic Cycle and Radiative Fluxes: Comparisons between Observations and a GCM
1DECEMBER 2000 LIN ET AL. 4159 Diurnal Variability of the Hydrologic Cycle and Radiative Fluxes: Comparisons between Observations and a GCM XIN LIN, DAVID A. RANDALL, AND LAURA D. FOWLER Department of
More informationNorthern New England Climate: Past, Present, and Future. Basic Concepts
Northern New England Climate: Past, Present, and Future Basic Concepts Weather instantaneous or synoptic measurements Climate time / space average Weather - the state of the air and atmosphere at a particular
More informationRadiative Climatology of the North Slope of Alaska and the Adjacent Arctic Ocean
Radiative Climatology of the North Slope of Alaska and the Adjacent Arctic Ocean C. Marty, R. Storvold, and X. Xiong Geophysical Institute University of Alaska Fairbanks, Alaska K. H. Stamnes Stevens Institute
More informationCLIMES. Observed Scaling in Clouds and Precipitation and Scale Incognizance in Regional to Global Atmospheric Models
Observed Scaling in Clouds and Precipitation and Scale Incognizance in Regional to Global Atmospheric Models 1 Introduction Observations of scaling Log-linear (~ -5/3) decrease in cloud number concentration
More informationJOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114, D14107, doi: /2008jd011220, 2009
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114,, doi:10.1029/2008jd011220, 2009 Testing ice microphysics parameterizations in the NCAR Community Atmospheric Model Version 3 using Tropical Warm Pool International
More informationCharles Jones ICESS University of California, Santa Barbara CA Outline
The Influence of Tropical Variations on Wintertime Precipitation in California: Pineapple express, Extreme rainfall Events and Long-range Statistical Forecasts Charles Jones ICESS University of California,
More informationNEW ALGORITHM TO IMPROVE THE CLOUDINESS DATA SET OVER EASTERN PART OF ROMANIA *
Romanian Reports in Physics, Vol. 64, No. 3, P. 795 806, 2012 NEW ALGORITHM TO IMPROVE THE CLOUDINESS DATA SET OVER EASTERN PART OF ROMANIA * D.C. BOSTAN, S. STEFAN University of Bucharest, Faculty of
More informationANALYSIS OF THE MPAS CONVECTIVE-PERMITTING PHYSICS SUITE IN THE TROPICS WITH DIFFERENT PARAMETERIZATIONS OF CONVECTION REMARKS AND MOTIVATIONS
ANALYSIS OF THE MPAS CONVECTIVE-PERMITTING PHYSICS SUITE IN THE TROPICS WITH DIFFERENT PARAMETERIZATIONS OF CONVECTION Laura D. Fowler 1, Mary C. Barth 1, K. Alapaty 2, M. Branson 3, and D. Dazlich 3 1
More informationA perturbed physics ensemble climate modeling. requirements of energy and water cycle. Yong Hu and Bruce Wielicki
A perturbed physics ensemble climate modeling study for defining satellite measurement requirements of energy and water cycle Yong Hu and Bruce Wielicki Motivation 1. Uncertainty of climate sensitivity
More informationUnderstanding Predictability and Model Errors Through Light, Portable Pseudo-Assimilation and Experimental Prediction Techniques
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Understanding Predictability and Model Errors Through Light, Portable Pseudo-Assimilation and Experimental Prediction Techniques
More informationTropical Rainfall Extremes During the Warming Hiatus: A View from TRMM
Tropical Rainfall Extremes During the Warming Hiatus: A View from TRMM V Venugopal (with Jai Sukhatme) Centre for Atmospheric and Oceanic Sciences & Divecha Centre for Climate Change Indian Institute of
More informationBoundary layer equilibrium [2005] over tropical oceans
Boundary layer equilibrium [2005] over tropical oceans Alan K. Betts [akbetts@aol.com] Based on: Betts, A.K., 1997: Trade Cumulus: Observations and Modeling. Chapter 4 (pp 99-126) in The Physics and Parameterization
More informationGlobal Precipitation and Thunderstorm Frequencies. Part I: Seasonal and Interannual Variations
1092 JOURNAL OF CLIMATE VOLUME 14 Global Precipitation and Thunderstorm Frequencies. Part I: Seasonal and Interannual Variations AIGUO DAI National Center for Atmospheric Research,* Boulder, Colorado (Manuscript
More informationNew Insights into the January 2016 West Antarctic Melt Event from the AWARE Campaign and Climate Model Simulations
New Insights into the January 2016 West Antarctic Melt Event from the AWARE Campaign and Climate Model Simulations Julien P. Nicolas 1, Andrew M. Vogelmann 2, Ryan C. Scott 3, Aaron B. Wilson 1, Maria
More informationHow surface latent heat flux is related to lower-tropospheric stability in southern subtropical marine stratus and stratocumulus regions
Cent. Eur. J. Geosci. 1(3) 2009 368-375 DOI: 10.2478/v10085-009-0028-1 Central European Journal of Geosciences How surface latent heat flux is related to lower-tropospheric stability in southern subtropical
More informationA Multi-year Hindcast Experiment for Cloud and Precipitation Studies
A Multi-year Hindcast Experiment for Cloud and Precipitation Studies Hsi-Yen Ma Lawrence Livermore National Laboratory with Stephen Klein, Shaocheng Xie, Zhou Chen, Cathy Chuang, Tom Phillips, Xue Zheng,
More informationAn Introduction to Climate Modeling
An Introduction to Climate Modeling A. Gettelman & J. J. Hack National Center for Atmospheric Research Boulder, Colorado USA Outline What is Climate & why do we care Hierarchy of atmospheric modeling strategies
More informationShortwave Radiative Transfer in the Earth s Atmosphere: Current Models and Validation
Shortwave Radiative Transfer in the Earth s Atmosphere: Current Models and Validation Jennifer Delamere, Eli Mlawer, and Tony Clough Atmospheric & Environmental Research, Inc. Summary AER builds radiative
More informationClimate Dynamics (PCC 587): Hydrologic Cycle and Global Warming
Climate Dynamics (PCC 587): Hydrologic Cycle and Global Warming D A R G A N M. W. F R I E R S O N U N I V E R S I T Y O F W A S H I N G T O N, D E P A R T M E N T O F A T M O S P H E R I C S C I E N C
More informationAn Introduction to Coupled Models of the Atmosphere Ocean System
An Introduction to Coupled Models of the Atmosphere Ocean System Jonathon S. Wright jswright@tsinghua.edu.cn Atmosphere Ocean Coupling 1. Important to climate on a wide range of time scales Diurnal to
More informationShort Term forecasts along the GCSS Pacific Cross-section: Evaluating new Parameterizations in the Community Atmospheric Model
Short Term forecasts along the GCSS Pacific Cross-section: Evaluating new Parameterizations in the Community Atmospheric Model Cécile Hannay, Dave Williamson, Jerry Olson, Rich Neale, Andrew Gettelman,
More information5. General Circulation Models
5. General Circulation Models I. 3-D Climate Models (General Circulation Models) To include the full three-dimensional aspect of climate, including the calculation of the dynamical transports, requires
More informationThe Australian Summer Monsoon
The Australian Summer Monsoon Aurel Moise, Josephine Brown, Huqiang Zhang, Matt Wheeler and Rob Colman Australian Bureau of Meteorology Presentation to WMO IWM-IV, Singapore, November 2017 Outline Australian
More informationGeneral Circulation. Nili Harnik DEES, Lamont-Doherty Earth Observatory
General Circulation Nili Harnik DEES, Lamont-Doherty Earth Observatory nili@ldeo.columbia.edu Latitudinal Radiation Imbalance The annual mean, averaged around latitude circles, of the balance between the
More informationEmpirical orthogonal function analysis of the diurnal cycle of precipitation in a multi-scale climate model
Click Here for Full Article GEOPHYSICAL RESEARCH LETTERS, VOL. 36, L05812, doi:10.1029/2008gl036964, 2009 Empirical orthogonal function analysis of the diurnal cycle of precipitation in a multi-scale climate
More informationDiagnosing the characteristics of Sahel Drought in the Ensemble CAM 3.5 using Data Assimilation Yu-Heng Tseng HC/EFDL, NTU
Diagnosing the characteristics of Sahel Drought in the Ensemble CAM 3.5 using Data Assimilation Sahel Department of Atmospheric Sciences National Taiwan University Collaborators: Junjie Liu, Eugenia Kalnay,
More informationAssessing the Radiative Impact of Clouds of Low Optical Depth
Assessing the Radiative Impact of Clouds of Low Optical Depth W. O'Hirok and P. Ricchiazzi Institute for Computational Earth System Science University of California Santa Barbara, California C. Gautier
More informationA pole to pole west Pacific atmospheric teleconnection during August
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 107, NO. D18, 4359, doi:10.1029/2001jd001335, 2002 A pole to pole west Pacific atmospheric teleconnection during August Keith M. Hines 1 and David H. Bromwich 1,2
More information! An Update on CAM-CLUBB Coupled Simulations
! An Update on CAM- Coupled Simulations! Peter Bogenschutz, Andrew Gettelman, Vincent Larson, Cheryl Craig, Hugh Morrison, Jack Chen, Katherine Thayer- Calder, Sean Santos, David Schannen, and Rachel Storer
More informationATMO 436a. The General Circulation. Redacted version from my NATS lectures because Wallace and Hobbs virtually ignores it
ATMO 436a The General Circulation Redacted version from my NATS lectures because Wallace and Hobbs virtually ignores it Scales of Atmospheric Motion vs. Lifespan The general circulation Atmospheric oscillations
More informationJ12.4 SIGNIFICANT IMPACT OF AEROSOLS ON MULTI-YEAR RAIN FREQUENCY AND CLOUD THICKNESS
J12.4 SIGNIFICANT IMPACT OF AEROSOLS ON MULTI-YEAR RAIN FREQUENCY AND CLOUD THICKNESS Zhanqing Li and F. Niu* University of Maryland College park 1. INTRODUCTION Many observational studies of aerosol indirect
More informationClimate Modeling: From the global to the regional scale
Climate Modeling: From the global to the regional scale Filippo Giorgi Abdus Salam ICTP, Trieste, Italy ESA summer school on Earth System Monitoring and Modeling Frascati, Italy, 31 July 11 August 2006
More informationAdvanced Hydrology. (Web course)
Advanced Hydrology (Web course) Subhankar Karmakar Assistant Professor Centre for Environmental Science and Engineering (CESE) Indian Institute of Technology Bombay Powai, Mumbai 400 076 Email: skarmakar@iitb.ac.in
More informationEl Niño Seasonal Weather Impacts from the OLR Event Perspective
Science and Technology Infusion Climate Bulletin NOAA s National Weather Service 41 st NOAA Annual Climate Diagnostics and Prediction Workshop Orono, ME, 3-6 October 2016 2015-16 El Niño Seasonal Weather
More informationThe Australian Operational Daily Rain Gauge Analysis
The Australian Operational Daily Rain Gauge Analysis Beth Ebert and Gary Weymouth Bureau of Meteorology Research Centre, Melbourne, Australia e.ebert@bom.gov.au Daily rainfall data and analysis procedure
More informationCan dust cause droughts?
Can dust cause droughts? Dust and sea surface temperature forcing of the 1930 s Dust bowl Cook et al., GRL 2008 Impact of desert dust radiative forcing on Sahel precipitation: Radiative Importance of dust
More informationARM Climate Research Facility: Goals and Objectives
ARM Climate Research Facility: Goals and Objectives Provide the national and international scientific community with the infrastructure needed for scientific research on global change Global change research
More information